The technological development route of the Ashen Kingdom was exceptionally unique. It wasn't a matter of gradual exploration; it resembled more of "painting by the numbers." For instance, they directly created piston-type steam engines to ensure the normal operation of trains.
The players of the Mechanical God Cult left behind a large number of blueprints and materials from another world before they departed.
As a reward, they would receive initial shares of the railway group when they returned to Airez, and they also had a portion of the steam locomotive transport profits.
The local researchers of the kingdom only needed to follow these blueprints, combining the ingenious designs with Airez's Magic reactions. It was akin to a magical version of the "Industrial Revolution," minus many of the convoluted pathways, and they could always make the correct choice each time.